Biomass pretreatment using deep eutectic solvents from lignin derived phenols

Kim, Kwang Ho; Dutta, Tanmoy; Sun, Jian; Simmons, Blake A.; Singh, Seema

doi:10.1039/c7gc03029k

Cited by 275 publications

(161 citation statements)

References 28 publications

Supporting

Mentioning

158

Contrasting

Unclassified

Order By: Relevance

“…Pioneering works have indicated that DES pretreatment can significantly promote the efficacy of residue cellulose enzymatic hydrolysis. The plant species, which on the pretreatment with different DESs, have been extended to gramineae [corncob (Procentese et al, 2015;Zhang et al, 2016), wheat straw (Jeong et al, 2015), sorghum (Das et al, 2018), and switchgrass (Chen et al, 2018;Kim et al, 2018)], hardwood [eucalyptus (Shen et al, 2019), willow (Lyu et al, 2018;Song et al, 2019), and poplar (Alvarez-Vasco et al, 2016;Liu et al, 2017)], softwood [pine (Lynam et al, 2017), spruce (Wahlström et al, 2016), and fir (Alvarez-Vasco et al, 2016)], and endocarp (Li et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Structural Transformation of Wood Lignin During Deep Eutectic Solvent Treatment

Wang

Xiao

et al. 2020

Front. Energy Res.

View full text Add to dashboard Cite

Deep eutectic solvents (DESs) can efficiently promote the efficiency of cellulose enzymatic hydrolysis through the removal of lignin component in lignocellulosic biomass pretreatment. Unraveling the fundamental structural variant of lignin during DES treatment would facilitate to understand the DES-based biomass pretreatment in a clear perspective. Herein, an enzymatic mild acidolysis lignin (EMAL) and a series of β-O-4 lignin model compounds were employed to be treated with choline chloride (ChCl)/lactic acid (LA) (1:2) DES, from which the structural variant of all lignin fractions can be realized in a detailed version. The β-O-4 linkages, existing in either realistic lignin or model compounds, could be cleaved by ChCl/LA, thus leading to the decrease of molecular weight and the rise of hydroxyl groups. The influence of reaction temperature and time was also examined in view of some key structural parameters. Experimental evidences from model compounds confirmed that the repolymerization occurs with the depolymerization of lignin, which may account for the low production of monomeric products during DES treatment.

show abstract

Section: Introductionmentioning

confidence: 99%

Unraveling the Structural Transformation of Wood Lignin During Deep Eutectic Solvent Treatment

Wang

Xiao

et al. 2020

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…Main substructures are depicted in Figure . The cross‐signals in the 2D HSQC spectra of the samples were assigned by comparison with the published literature . The quantitative analysis of the structure features of all the samples were conducted according to the method reported by a previous paper …”

Section: Resultsmentioning

confidence: 99%

Analysis of phenolic compounds obtained from bamboo microwave liquefaction for fast‐curing phenol‐formaldehyde resin preparation

Yang

Fan

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Three wastes originated from outer surface, shallow surface, and inner surface of bamboo during bamboo-mat preparation were liquefied using microwave energy in a binary solvent (glycerol/methanol). The properties (yield, molecular structure, and molecular weight distribution) of the lignin fractions in the obtained phenolic compounds were contrastively analyzed with proto-lignin in the materials. Results showed that >58% of the lignin in the bamboo cell walls could be degraded and moved to the phenolic compounds via the cleavage of β-O-4 0 aryl ether bonds during the microwave liquefaction process. Some polysaccharides still connected with the lignin fraction in the phenolic compounds through covalent bonds. The phenolic compounds displayed well solubility in common organic solvents (ethanol/water cosolvent, acetone, tetrahydrofuran, 1,4-dioxane, and dimethyl sulfoxide). A fast-curing phenol-formaldehyde resin was successfully synthesized with the phenolic compounds under the presence of MgO, and a 23.23% curing time reduction was achieved.

show abstract

“…Besides its conversion into MA, catechol obtained from engineered bioenergy crops could represent a value-added product since it is a starting material for the manufacturing of insecticides (e.g., carbofuran and propoxur), fragrances, drugs, and polymerization inhibitors [39]. Recently, catechol was converted to a deep eutectic solvent (DES) that was found to be effective for the pretreatment of plant biomass and facilitate the removal of lignin prior enzymatic saccharification [40].…”

Section: Muconic Acidmentioning

confidence: 99%

“…Other engineered microbial strains have been designed to upgrade pCA into resveratrol, an antioxidant with potential benefits for human health [64][65][66], as well as the biofuel precursor bisabolene [18], the platform chemical muconic acid [67], the biodegradable polyester precursor lactic acid [68], and polyhydroxyalkanoate polyesters [20,69,70]. Moreover, pCA can be transformed chemically to deep eutectic solvents potentially useful for biomass pretreatments [40] and converted to different types of high-performance polymers [71,72].…”

Section: P-coumaratementioning

confidence: 99%

Strategies for the production of biochemicals in bioenergy crops

Lin

Eudes

2020

Biotechnol Biofuels

View full text Add to dashboard Cite

Industrial crops are grown to produce goods for manufacturing. Rather than food and feed, they supply raw materials for making biofuels, pharmaceuticals, and specialty chemicals, as well as feedstocks for fabricating fiber, biopolymer, and construction materials. Therefore, such crops offer the potential to reduce our dependency on petrochemicals that currently serve as building blocks for manufacturing the majority of our industrial and consumer products. In this review, we are providing examples of metabolites synthesized in plants that can be used as bio-based platform chemicals for partial replacement of their petroleum-derived counterparts. Plant metabolic engineering approaches aiming at increasing the content of these metabolites in biomass are presented. In particular, we emphasize on recent advances in the manipulation of the shikimate and isoprenoid biosynthetic pathways, both of which being the source of multiple valuable compounds. Implementing and optimizing engineered metabolic pathways for accumulation of coproducts in bioenergy crops may represent a valuable option for enhancing the commercial value of biomass and attaining sustainable lignocellulosic biorefineries.

show abstract

Biomass pretreatment using deep eutectic solvents from lignin derived phenols

Abstract: In future biorefineries, the development of inexpensive and renewable reagents for biomass pretreatment is highly desirable.

Cited by 275 publications

References 28 publications

Unraveling the Structural Transformation of Wood Lignin During Deep Eutectic Solvent Treatment

Unraveling the Structural Transformation of Wood Lignin During Deep Eutectic Solvent Treatment

Analysis of phenolic compounds obtained from bamboo microwave liquefaction for fast‐curing phenol‐formaldehyde resin preparation

Strategies for the production of biochemicals in bioenergy crops

Contact Info

Product

Resources

About